PDF Annotator
Highlight, note, draw, and place shapes on PDF pages, then export a flattened an...Highlight, note, draw, and place shapes on PDF pages, then export a flattened annotated copy locally in your browser.
Markup Studio
Review a PDF, mark what matters, and export a clean annotated copy.
Highlight, add notes, draw correction marks, and stamp visible markup locally in your browser.
Pages
Add
Marks
0
Output
After upload
Annotation recipe
Pick the review intent before placing marks.
PDF canvas
Upload a PDF, then click the page to place the selected tool.
Drop a PDF here, or click to browse
PDF documents only. Your file stays on this device.
Preview
Upload a PDF to render the first page.
PDF Annotator Features
Why Use PDF Annotator?
Completely Free
No limits, no signup, no premium tiers. Use PDF Annotator as much as you need, forever.
100% Private
All processing happens in your browser. Your data never leaves your device.
Instant Results
Get results in seconds with no waiting, no queues, and no file uploads to slow servers.
Works Everywhere
Fully responsive — works on desktop, tablet, and mobile with no app download needed.
No Installation
Works directly in your browser. No software to install, no plugins required.
Always Available
Available 24/7 from anywhere in the world. Bookmark it and use it whenever you need.
Who Uses PDF Annotator?
For Students
Highlight readings and add margin notes to handouts, papers, and study guides.
For Professionals
Review contracts, briefs, reports, and proposals without sending sensitive files away.
For Product Teams
Mark screenshots, specs, and design PDFs with clear callouts before handoff.
For Everyone
Add quick visual notes to forms, manuals, recipes, and shared PDFs.
How It Works
Upload PDF
Upload a PDF and render a page preview locally in your browser.
Add Markup
Choose highlight, text, pen, or shape tools and click the page to place annotations.
Export Copy
Stamp visible markup into a new PDF copy while keeping the original unchanged.
Tips
Keep Originals
Exports are flattened for reliable viewing, so keep the original PDF if you need an editable review file.
Use Recipes
Switch recipes before marking up to get a tool/color setup that matches your review job.
Touch Friendly
On phones and tablets, use Place mark for precise repeatable annotations when finger placement is awkward.